CN1904183B - Thread-cutting device for keyhole sartorius - Google Patents

Thread-cutting device for keyhole sartorius Download PDF

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Publication number
CN1904183B
CN1904183B CN2006101085341A CN200610108534A CN1904183B CN 1904183 B CN1904183 B CN 1904183B CN 2006101085341 A CN2006101085341 A CN 2006101085341A CN 200610108534 A CN200610108534 A CN 200610108534A CN 1904183 B CN1904183 B CN 1904183B
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China
Prior art keywords
blade
knife edge
thread cutting
tangent line
sewing
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CN2006101085341A
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Chinese (zh)
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CN1904183A (en
Inventor
清水靖宏
铃木裕之
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Brother Industries Ltd
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Brother Industries Ltd
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Priority to JP2005-218733 priority Critical
Priority to JP2005218733A priority patent/JP4760190B2/en
Priority to JP2005218733 priority
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Publication of CN1904183A publication Critical patent/CN1904183A/en
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Publication of CN1904183B publication Critical patent/CN1904183B/en
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Abstract

A thread cutting device (20) of button hole sewing machine (1) of the invention comprises: an upper edge member (21) and a lower edge member (22) rotatablely mounted on the feeding table (7) separately by the stepped screw (26), a tangent action mechanism (23) causing tangent action of the upper edge member (21) and the lower edge member (22), the tangent action mechanism (23) carries out the action near the sewing finishing position of the button hole stitch (HN) when one of the upper edge member (21) and the lower edge member (22) stops or basically stops rotation.

Description

The thread cutting device of button holing sewing machine
Technical field
The present invention relates to the thread cutting device of the button holing sewing machine that suture that a kind of sewing end position of the keyhole seam that will implement from sewn object extends cuts off.
Background technology
In the past, around buttonholes such as round end hole, implemented making of keyhole stitch seam by button holing sewing machine with the narrow and small linearity hole portion of width and the roughly rounded hole portion that is connected with this linearity hole portion one end.Implement the button holing sewing machine that this keyhole stitch seam is made, shank that driven in synchronism is installed with suture needle with this shank below in the looper of relative configuration, the feeding table that makes mounting sewn object moves on directions X and Y direction, to form various keyhole stitch seam.This keyhole stitch seam is sewed when finishing, and the suture cut-out that the thread cutting device on the described feeding table will extend from the sewing end position of described keyhole seam is located in use.
As the thread cutting device of this button holing sewing machine, for example record following a kind of structure in Japanese Patent Laid No. 321589 communique of open calendar year 2001.In this thread cutting device, on the right delivery sheet of the right-hand position of stitching center line, rotating upper cutter and lower cutter are installed by stepped screw.Tangent line drives crank and is connecting the connection connecting rod, and this connects connecting rod and is connected with an end of upper cutter by the upper cutter connecting rod, is connected with an end of lower cutter by the lower cutter connecting rod simultaneously.
During tangent line, enter in case drive cylinder body, then the tangent line connecting rod crank rotates, and drives crank by tangent line the connection connecting rod is moved, and thus, upper cutter and lower cutter rotate towards approaching mutually direction simultaneously.By the rotation of these upper cutters and lower cutter, in the sewing end position vicinity of round end keyhole seam, the blade of upper cutter and the blade of lower cutter meet, and will cut off simultaneously from bottom line and the heart yearn that keyhole stitch seam is extended.
But, in this thread cutting device, owing on the right delivery sheet of the right-hand position of stitching center line, be rotatably mounted upper cutter and lower cutter, and, the situation incision breaking joint line that rotates simultaneously at upper cutter and lower cutter, therefore, the stitching center line of upper cutter and the relative round end keyhole stitch seam of the formed cut-out track of lower cutter is on the angled straight lines that tilts with predetermined angular.
That is, when the needle gage of the round end keyhole stitch seam of making not simultaneously, shown in Figure 6 as among the embodiment, the angled straight lines variation shown in the off-position generation double dot dash line L0 of upper cutter and lower cutter.Like this, the off-position that the suture that the sewing end position from round end keyhole seam is extended cuts off can produce deviation because of the difference of needle gage, reserves the problem that length produces deviation so exist line to cut off the back at the suture at sewing end position place.
Summary of the invention
Even the object of the present invention is to provide a kind of needle gage difference of keyhole stitch seam also can suppress to cut off the thread cutting device of button holing sewing machine that the back suture is reserved the deviation of length as far as possible.
The thread cutting device of button holing sewing machine of the present invention, on the feeding table of the pay-off of carrying sewn object, have upper knife edge member and following blade member, described upper knife edge member and following blade member are mounted to and can rotate respectively by shared vertical axis member, meet in described sewing end position vicinity by blade and the described blade of blade member down that makes described upper knife edge member, cut off the suture that extends from the sewing end position of the keyhole implemented at sewn object seam, it is characterized in that, has the tangent line actuation mechanism that makes described upper knife edge member and described blade member down produce thread cutting action, and the actuator that drives described tangent line actuation mechanism, described tangent line actuation mechanism makes described upper knife edge member and described blade member down carry out thread cutting action, with near described sewing end position, under the state that side's blade member in described upper knife edge member and described blade member down stops operating or stops operating basically, the described suture that extends from the sewing end position is cut off.
Adopt the present invention, owing to carry out thread cutting action under the state that the side's blade member in upper knife edge member and following blade member stops operating, therefore, upper knife edge member and the formed cut-out track of following blade member are in the blade position of rotating the blade member after stopping.If make the blade member that stops operating stop at the position of its blade along the stitching center line of keyhole stitch seam, suppress most sew the relatively variation of end position of off-position even then also can use up in the different occasion of the needle gage of keyhole stitch seam, the suture at the end position place that can suppress to sew is reserved the deviation of length.
The thread cutting device of button holing sewing machine of the present invention, on the feeding table of the pay-off of carrying sewn object, have upper knife edge member and following blade member, described upper knife edge member and following blade member are mounted to the blade and the described blade of blade member down that can rotate respectively by shared vertical axis member by making described upper knife edge member and meet in described sewing end position vicinity, cut off the suture that extends from the sewing end position of the keyhole implemented at sewn object seam, it is characterized in that, has the tangent line actuation mechanism that makes described upper knife edge member and described blade member down produce thread cutting action, and the actuator that drives described tangent line actuation mechanism, described tangent line actuation mechanism makes described upper knife edge member and described blade member down carry out thread cutting action, with near described sewing end position, side's blade member in described upper knife edge member and described down blade member is cut off the described suture that extends from the sewing end position from beginning to reset under the situation of rotating near a side turned position of the opposing party's blade member to greatest extent.
Adopt the present invention, because rotating the rotation of the following blade member that resets when line cut off resets and is set in the maximum length in the needle gage scope that can cut off and the centre position of minimum length constantly, therefore, even also can suppress sew the relatively variation of end position of off-position significantly in the different occasion of the needle gage of keyhole stitch seam, the suture at the end position place that can suppress to sew is reserved the deviation of length.
Description of drawings
Fig. 1 is the stereoscopic figure of the Sewing machines of expression embodiments of the invention 1.
Fig. 2 is the vertical view of feeding table.
Fig. 3 is the vertical view of thread cutting device part.
Fig. 4 is the vertical section side view of thread cutting device part.
Fig. 5 A is the vertical view of the preceding state of tangent line of thread cutting device.
Figure when Fig. 5 B is the thread cutting action of thread cutting device, suitable with Fig. 5 A.
Fig. 5 C is the thread cutting action of thread cutting device figure when finishing, suitable with Fig. 5 A.
Fig. 6 is near the amplification plan view of the part of upper knife edge member and following blade member.
Fig. 7 A is expression figure embodiments of the invention 2, suitable with Fig. 5 A.
Fig. 7 B is expression figure embodiments of the invention 2, suitable with Fig. 5 B.
Fig. 7 C is expression figure embodiments of the invention 2, suitable with Fig. 5 C.
Fig. 8 A is expression figure embodiments of the invention 3, suitable with Fig. 5 A.
Fig. 8 B is expression figure embodiments of the invention 3, suitable with Fig. 5 B.
Fig. 8 C is expression figure embodiments of the invention 3, suitable with Fig. 5 C.
Fig. 9 A is expression figure embodiments of the invention 4, suitable with Fig. 5 A.
Fig. 9 B is expression figure embodiments of the invention 4, suitable with Fig. 5 B.
Fig. 9 C is expression figure embodiments of the invention 4, suitable with Fig. 5 C.
Figure 10 A is expression figure embodiments of the invention 5, suitable with Fig. 5 B.
Figure 10 B is expression figure embodiments of the invention 5, suitable with Fig. 5 C.
The specific embodiment
<embodiment 1 〉
Embodiments of the invention 1 are described with reference to the accompanying drawings.Present embodiment is that the present invention is applicable to the example of going up the round end button holing sewing machine occasion of the round end keyhole stitch seam HN (with reference to Fig. 3) that forms the caudal knot shape at for example denim (JEANETTE).
As shown in Figure 1, round end button holing sewing machine 1, have: be positioned in the base plate 3 in this support 2, the post portion 4 of founding the back quadrate part of being located at this base plate 3 and the casing portion 5 of forwards extending etc., and this round end button holing sewing machine 1 is fixed on the sewing machine table (not shown) by mounting from the top of this post portion 4 support 2 of the roughly rectangular case shape that the top is open, embedding shape.
Though not shown, the front end bottom in casing portion 5 is provided with the shank that moves up and down that suture needle is installed, by passing to cam mechanism by the main axis rotation that electrical motor of sewing machine drives, described shank swings with the regulation amplitude, moves up and down simultaneously.At this moment, every rotation 2 circles of main shaft, shank is swung 1 time on left side swing position and right side swing position.
In described base plate 3, relatively be provided with the curved needle seat (not shown) that 2 loopers (not shown) are installed with described shank.When the rotation of described main shaft was delivered to 2 loopers by not shown cam mechanism, moving up and down of 2 loopers and described shank synchronously swung.This shank and curved needle seat carry out unitary rotation around vertical axis respectively by the rotating mechanism (not shown) that is made of θ direction drive motor and gear mechanism that is equipped in the base plate 3 on horizontal plane.
In base plate 3, removably cutting knife (not shown) is installed on the position of curved needle seat rear side, be used to form the round end hole.Though not shown, be provided with rotating stamping-out with the hammer body at the base portion of described casing portion 5, at the leading section of this hammer body removably round end hole hammer is installed.Described stamping-out rotates by the hammer driving mechanism of being located in the base plate 3 (not shown) that is made of cylinder etc. with the hammer body, and the described relatively cutting knife of described hammer is from the top butt, thereby forms the round end hole on sewn object.
Facially on base plate 3 be provided with the feeding table 7 that integral body is thin rectangular box shape.As shown in Figure 2,1 pair presser foot 8,9 about the left and right directions on feeding table 7 (directions X) central portion is provided with respectively.Central portion at presser foot 8,9 is being fixed needle plate 10 and needle plate 11 by screw 12 (with reference to Fig. 3, Fig. 6 etc.) respectively.Needle plate 10 on presser foot 8,9 and the place ahead of needle plate 11 are provided with cover plate 13 (with reference to Fig. 3, Fig. 4 etc.).
Needle plate 10,11 can be made length difference apart from the round end keyhole stitch seam HN that reaches 8mm approximately.Following various needle plates 10,11 have for example been prepared in advance: the needle plate 10,11 that can make the round end keyhole stitch seam HN of 14mm~22mm length; Can make the needle plate 10,11 of the round end keyhole stitch seam HN of 22mm~30mm length; Can make the needle plate 10,11 etc. of the round end keyhole stitch seam HN of 34mm~42mm length.
In base plate 3, be provided with in the Y direction travel mechanism (art diagram) that makes described feeding table 7 carry out the directions X travel mechanism (not shown) that directions X (left and right directions) feeding moves under the directions X feeding motor-driven and under Y direction feeding motor-driven, make described feeding table 7 carry out Y direction (fore-and-aft direction) feeding to move.These travel mechanisms can make the feeding table 7 of placing sewn object carry out feeding with described sewn object and move.Feeding table 7, directions X travel mechanism and Y direction travel mechanism constitute the pay-off of carrying sewn object.
On feeding table 7, be provided with keep sewn object about 1 pair presser feet handle 15,16, at the leading section of these presser feet handles 15,16 presser feet (not shown) is installed respectively.These presser feet handles 15,16 are subjected to the driving of not shown cylinder, switch the retreating position and the connecing between the pressure position of downside of upside.
The thread cutting device 20 that cuts off of bottom line that the sewing end position of the round end keyhole stitch seam HN that will implement from sewn object is extended and heart yearn is made an explanation below.
This thread cutting device 20 comprises: upper knife edge member 21, following blade member 22, the tangent line cylinder 24 etc. that makes upper knife edge member 21 and following blade member 22 produce the tangent line actuation mechanism 23 of thread cutting action and drive this tangent line actuation mechanism 23.
Shown in Fig. 2, Fig. 3 etc., the position, dead ahead of the needle plate 10 on presser foot 8, the upper knife edge member 21 that is provided with down blade member 22 rotationally and is positioned at this time blade member 22 upsides by stepped screw 26 (being equivalent to shared vertical axis member).As shown in Figure 3, being of upper knife edge member 21 falculate fore-end be formed with blade 21a, simultaneously affixed the line keeper 27 that is used to keep cut bottom line and heart yearn.Following blade member 22 constitutes the part of needle plate 10, makes the sewing end position of the as far as possible close round end keyhole stitch seam HN of line off-position.
As Fig. 2, shown in Figure 3, the leading section in feeding table 7 inside sets as the tangent line of actuator with cylinder 24 along left and right directions.The leading section of its piston rod 24a affixed overlook and see the connecting elements 28 that roughly is U word shape.During tangent line, the Compressed Gas that this tangent line is accepted from not shown valve module with cylinder 24, thereby towards approach axis (right) piston rod 24a.
Disposing the tangent line actuation mechanism 23 that is made of linkage at the rear of described connecting elements 28, is to make upper knife edge member 21 and following blade member 22 produce the tangent line actuation mechanism 23 of action.This tangent line actuation mechanism 23 is made an explanation.
Shown in Fig. 3, Fig. 4 etc., forniciform start connecting rod 30 at the following surface bearing of presser foot 8, and this start connecting rod 30 can rotate at its bend by screw 31.The leading section of this start connecting rod 30 affixed the fulcrum 32 that extends downwards, rotatable roller bearing member 33 is installed on this fulcrum 32.In the dead astern of this start connecting rod 30, be provided with the driving shaft 34 that runs through presser foot 8 up and down on this presser foot 8 rotationally.
Affixed the bend of forniciform drive link 35 in the bottom of driving shaft 34.Drive link 35 is rotatably supported in the downside of presser foot 8 by driving shaft 34.Rearward end and the right part that is connected connecting rod 36 by pin 37 connection start connecting rods 30 connect this left part that connects connecting rod 36 and the leading section of drive link 35 by pin 38.
Affixed the bend of seeing the start connecting rod 39 that roughly is V word shape of overlooking in the upper end of driving shaft 34.Start connecting rod 39 is rotatably supported in the upside of presser foot 8 by driving shaft 34.The leading section and the left part that is connected connecting rod 40 that connect the arm 39a of start connecting rod 39 by pin 41.The right part of this connection connecting rod 40 is connected with the following blade connecting portion 22b that is formed on down with standing shape on the blade member 22 by pin 42.
The leading section and the leading section that is connected connecting rod 43 that connect the arm 39b of start connecting rod 39 by pin 44.The rearward end of this connection connecting rod 43 is connected with the upper knife edge connecting portion 21b that is formed on standing shape on the upper knife edge member 21 by pin 45.
Shown in the double dot dash line among Fig. 3, the facial recess 8a that roughly is V word shape that is formed with on presser foot 8.Aforesaid connection connecting rod 40 be connected connecting rod 43 and be housed among the recess 8a.Thus, connect connecting rod 40, be adapted to the form that on presser foot 8, connects with the upper knife edge connecting portion 21b of the start connecting rod 39 that is connected connecting rod 43 connections, time blade member 22 and upper knife edge member 21.
At the downside of presser foot 8, the rearward end of affixed the tabular component 46 that extends along fore-and-aft direction on drive link 35.Setting up draft helical spring 48 between the screw 47 below the leading section of tabular component 46 and circle are connected on presser foot 8.Utilize the tensile force of this draft helical spring 48, start connecting rod 30 and position of readiness restriction screw 49 butts that are fixed in below the presser foot 8 are all the time by to the position of readiness direction application of force shown in Figure 3.
Like this, by the linkage that constitutes by a plurality of connecting rods (start connecting rod 30, drive link 35, connection connecting rod 36, start connecting rod 39, connection connecting rod 40, connection connecting rod 43), as shown in Figure 3, following blade member 22 is positioned at the position of readiness as the part performance function of needle plate 10, and upper knife edge member 21 is positioned at more to the big more position of readiness of needle plate 11 openings.Under this state, drive tangent line with cylinder 24, connecting elements 28 advances to the position shown in the double dot dash line among Fig. 3 with piston rod 24a, at this moment, makes start connecting rod 30 turn to the release position shown in Fig. 5 C in the counterclockwise direction by connecting elements 28.
The blade 21a by making upper knife edge member 21 and the blade 22a of following blade member 22 meet, thereby when finishing, the sewing of round end keyhole stitch seam HN will cut off from bottom line and the heart yearn that the sewing end position extends, this moment, the driving shaft 34 that occurs start connecting rod 39 sometimes was with the pin 41 that is connected connecting rod 40 and sell 42 situations about roughly being positioned on the straight line as Fig. 5, shown in Figure 6.
This occasion, pin 41 moves on the circular arc that with driving shaft 34 is the center, because of the following blade connecting portion 22b of blade member 22 down is not subjected to basically from the rotatory force that connects connecting rod 40, thus under the rotation of blade member 22 stop basically.But, because following the rotation of start connecting rod 39, forwards moves by connection connecting rod 43, upper knife edge member 21 continues to be subjected to clockwise rotatory force, so continue blade member 22 directions rotation down.Like this, under the state that blade member 22 stops operating basically down, only rely on the rotation of upper knife edge member 21 that bottom line and heart yearn are cut off.
As previously mentioned, utilize be installed on the left and right sides presser foot 8,9 about 1 pair of needle plate 10,11 can make length difference apart from reaching many kinds of round end keyhole stitch seam of 8mm HN approximately.When forming the round end keyhole stitch seam HN of caudal knot shape shown in Figure 6, with respect to the position KC at round end keyhole stitch seam HN top, the sewing end position LC of the sewing end position SC of the round end keyhole stitch seam HN of minimum length and the round end keyhole stitch seam HN of maximum length differs 8mm approximately.
Described tangent line actuation mechanism 23 constitutes, from the sewing end position LC tangent line in the sewing end position SC place tangent line that is separating about 8mm during in, blade member 22 is stopped operating basically.Thus, upper cutter member 21 and lower cutter member 22 formed cut-out tracks are shown in the solid line L among Fig. 6, and relatively the stitching center line C of round end keyhole stitch seam HN is on the angled straight lines that the blade 22a front end by the following blade member 22 under the dissengaged positions determined.Therefore, separate sewing end position LC and the sewing end position SC of about 8mm, on left and right directions, differ microsize δ (for example about 0.9mm).
The following describes the effect and the effect of the thread cutting device 20 that as above constitutes.
Make when preparing and make in the process, shown in Fig. 5 A, owing to do not drive tangent line with cylinder 24, so as previously mentioned, upper knife edge member 21 is in position of readiness respectively with following blade member 22.When sewing finishes, drive tangent line cylinder 24, its driving force passes to upper knife edge member 21 by described linkage and reaches blade member 22 down, and upper knife edge member 21 and following blade member 22 are rotated in the opposite direction.In the rotation way of this time blade member 22, in during the state of state from the thread cutting action of the thread cutting device shown in Fig. 5 B 20 time when the tangent line shown in Fig. 5 C finishes, the driving shaft 34 of start connecting rod 39 is with the pin 41 that is connected connecting rod 40 and sold for the 42 state continuance stipulated times that roughly are positioned on the straight line.
At this moment, irrelevant with the rotation of start connecting rod 39 as previously mentioned, under the state that blade member 22 stops operating basically down, have only upper knife edge member 21 to continue along clockwise direction, promptly rotate towards the direction of following blade member 22.Utilize the rotation of the upper knife edge member 21 under this time blade member 22 halted states that blade 21a, 22a are met, bottom line and heart yearn are cut off.
Like this, tangent line actuation mechanism 23 constitutes, and in sewing end position LC, SC vicinity, carries out thread cutting action under the state that blade member 22 stops operating basically down.Because the blade 22a of blade member 22 is stopped along the stitching center line C of round end keyhole stitch seam HN basically, therefore the off-position of left and right directions can be suppressed at microsize δ with respect to the variation of sew end position LC, SC.Thus, even also can suppress sew the relatively variation of end position of off-position as far as possible in the different occasion of the length of round end keyhole stitch seam HN, can suppress to cut off the back and reserve length generation deviation, can shorten suture as far as possible and reserve length at the suture at sewing end position place.
Owing to use 1 tangent line to make 23 actions of tangent line actuation mechanism with cylinder 24, will cut off from the suture that the sewing end position extends, therefore can realize the simplification that thread cutting device 20 constitutes.
Because following blade member 22 is being made a part that constitutes needle plate 10 under the state, tangent line actuation mechanism 23 is carried out thread cutting action under its state that blade member 22 stops operating down, the part that therefore can effectively utilize needle plate 10 constitutes blade member 22 down, can stop to carry out tangent line by the rotation of this time blade member 22.
Because tangent line actuation mechanism 23 passes to upper knife edge member 21 and down blade member 22 with tangent line with the driving force of cylinder 24 by linkage, therefore can realize the simplification of tangent line actuation mechanism 23 formations.
<embodiment 2 〉
Fig. 7 A~Fig. 7 C represents embodiments of the invention 2, and the part different with embodiment 1 described.The part mark prosign identical with embodiment 1.
Shown in Fig. 7 A, tangent line actuation mechanism 64 comprises: with the arm 39a of previous embodiment extended given size start connecting rod 65, will connect connecting rod 43 extended given size connection connecting rod 66 and other start connecting rods 30 identical, drive link 35 with previous embodiment, connect connecting rod 36, connect connecting rod 40.When not driving tangent line and prepare with making of cylinder 24 and make in the process, start connecting rod 30 concerns shown in Fig. 7 A with the position of following blade member 22 and upper knife edge member 21, and is identical with Fig. 5 A.
When sewing finishes, drive tangent line cylinder 24, its driving force is delivered to upper knife edge member 21 by tangent line actuation mechanism 64 and reaches blade member 22 down, and upper knife edge member 21 and following blade member 22 are rotated in the opposite direction.In the rotation way of this time blade member 22, shown in Fig. 7 B, the driving shaft 34 that becomes start connecting rod 65 is with the pin 41 that is connected connecting rod 40 and sell 42 linear states that are positioned on the straight line, and, the pin 41 of connection connecting rod 40 is crossed described linear state and is rotated, the state when arriving the tangent line end shown in Fig. 7 C.
Thus, irrelevant with the rotation of start connecting rod 65, following blade member 22 near rotations that begin to reset of a side turned position of upper knife edge member 21, and has only upper knife edge member 21 to continue rotation along clockwise direction to greatest extent.Thereby the fast speed of the velocity of rotation that this upper knife edge member 21 rotates to reset than following blade member 22 is rotated and is caught up with down blade member 22, thereby blade 21a, 22a meet, and bottom line and heart yearn are cut off.
Like this, tangent line actuation mechanism 64 constitutes, and in sewing end position vicinity, under the situation of rotating that begins to reset near a side turned position of upper knife edge member 21 to greatest extent, carries out thread cutting action in blade member 22 down.Thus, the rotation of rotating the following blade member 22 that resets when line is cut off resets and is set in the maximum length and the centre position of minimum length in the needle gage scope that can cut off constantly, can suppress the variation of the off-position of left and right directions with respect to the end position of sewing significantly.When utilizing tangent line actuation mechanism 64 to carry out tangent line, the blade 21a by setting upper knife edge member 21 for and the blade 22a of following blade member 22 are roughly meeting along the position of described stitching center line C, can suppress the variation of the off-position of left and right directions with respect to the end position of sewing significantly.Thus, reserve length generation deviation even also can suppress to cut off the back significantly at sewing end position place suture, and can shorten suture as far as possible and reserve length in the different occasion of the needle gage of round end keyhole stitch seam HN.
<embodiment 3 〉
Fig. 8 A~Fig. 8 C represents embodiments of the invention 3, and the part different with embodiment 1 described.The part mark prosign identical with embodiment 1.
Replace the tangent line actuation mechanism 23 of previous embodiment and adopt tangent line actuation mechanism 67, the driving force of tangent line with cylinder 24 passed to upper knife edge member 21 and descend blade member 22 by cam mechanism.
Shown in Fig. 8 A, upper knife edge cam abutting part 21c is set to replace the upper knife edge connecting portion 21b of previous embodiment on upper knife edge member 21, blade cam abutting part 22c is to replace the following blade connecting portion 22b of previous embodiment under being provided with on the following blade member 22.In tangent line actuation mechanism 67, replace the start connecting rod 39 of previous embodiment and actuating cam 55 is fixed on the driving shaft 34.This actuating cam 55 has following blade cam part 55a and upper knife edge cam part 55b integratedly, is that the following blade at center is set for littler with the outstanding size of cam part 55b than upper knife edge with the outstanding size of cam part 55a with driving shaft 34.
Upper knife edge cam abutting part 21c is located at spring member 56 on the presser foot 8 to the actuating cam 55 side application of forces, and following blade cam abutting part 22c is located at spring member 57 on the presser foot 8 to the actuating cam 55 side application of forces.Thus, when not driving tangent line and prepare and make in the process with making of cylinder 24, start connecting rod 30 and upper knife edge member 21 and down the position relation of blade member 22 shown in Fig. 8 A, identical with Fig. 5 A.
When sewing finishes, drive tangent line cylinder 24, actuating cam 55 is followed the rotation of start connecting rod 30 and drive link 35 and is rotated along clockwise direction.Because the rotation of this actuating cam 55, upper knife edge cam abutting part 21c, following blade cam abutting part 22c move with being separated from each other, and therefore, upper knife edge member 21 and following blade member 22 are rotated in the opposite direction.In the rotation way of this time blade member 22, in during the state of state from the thread cutting action shown in Fig. 8 B time the when the tangent line shown in Fig. 8 C finishes, following blade is with the bearing surface of the projected direction of cam part 55a and following blade cam abutting part 22c state continuance stipulated time of quadrature roughly.
At this moment, rotate irrelevant with the clockwise direction of actuating cam 55, under the state that blade member 22 stops operating basically down, have only upper knife edge member 21 to use at upper knife edge under the effect of cam part 55b and continue along clockwise direction, promptly rotate towards the direction of following blade member 22.Utilize the rotation of the upper knife edge member 21 under this time blade member 22 halted states that blade 21a, 22a are met, bottom line and heart yearn are cut off.
Like this, tangent line actuation mechanism 67 constitutes, by cam mechanism the driving force of tangent line with cylinder 24 passed to upper knife edge member 21 and descend blade member 22, therefore, can not only obtain the effect identical, and utilize cam mechanism can realize the simplification that tangent line actuation mechanism 67 constitutes with previous embodiment.
<embodiment 4 〉
Fig. 9 A~Fig. 9 C represents embodiments of the invention 4, and the part different with embodiment 1 described.The part mark prosign identical with embodiment 1.
Inside at described feeding table 7, the tangent line that replaces previous embodiment be provided with down with cylinder 24 blade with solenoid 61 (being equivalent to the 2nd actuator) and upper knife edge with solenoid 63 (being equivalent to the 1st actuator), tangent line actuation mechanism 68 is by descending blade to drive with solenoid 63 with solenoid 61, upper knife edge.
That is, shown in Fig. 9 A, the following blade connecting portion 22b of following blade member 22 is connecting the rearward end that connects connecting rod 60, and the leading section of this connection connecting rod 60 is connecting to descend the plunger 61a of blade with solenoid 61.The upper knife edge connecting portion 21b of upper knife edge member 21 is connecting the rearward end that connects connecting rod 62, and the leading section of this connection connecting rod 62 is connecting the plunger 63a of upper knife edge with solenoid 63.
Upper knife edge with solenoid 63 towards be configured to following blade with solenoid 61 towards opposite.And drive blade solenoid 61 down, then its plunger 61a rearward enters, and connects connecting rod 60 and rearward moves, if drive upper knife edge solenoid 63, then its plunger 63a forwards enters, and connects connecting rod 62 and forwards moves.Under art drives blade with solenoid 61, upper knife edge with solenoid 63 make preparation the time and make in the process, the position of following blade member 22 and upper knife edge member 21 concerns shown in Fig. 9 A, and is identical with Fig. 5 A.
Sew when finishing, shown in Fig. 9 B, at first drive blade solenoid 61 down, utilize entering of its plunger 61a that connection connecting rod 60 is rearward moved, following blade member 22 turns to the position identical with Fig. 5 B of previous embodiment.Then, shown in Fig. 9 C, drive upper knife edge with solenoid 63, utilize entering of its plunger 63a that connection connecting rod 62 is forwards moved, upper knife edge member 21 turns to the position identical with Fig. 5 C of previous embodiment.
Adopt this formation, the same with embodiment 1, the blade 22a of blade member 22 is roughly stopped along the stitching center line C of round end keyhole stitch seam HN.Thus, even also can suppress sew the relatively variation of end position of off-position as far as possible in the different occasion of the length of round end keyhole stitch seam HN, can suppress to cut off the back and reserve length generation deviation, can shorten suture as far as possible and reserve length at the suture at sewing end position place.
Blade moves with solenoid 63 generations with solenoid 61 and upper knife edge under the utilization independently because upper knife edge member 21 can be distinguished with following blade member 22, therefore, when utilizing tangent line actuation mechanism 68 to carry out tangent line, blade member 22 is stopped fully.Like this, even the needle gage difference of round end keyhole stitch seam also can be set in off-position on the same position with respect to the sewing end position all the time, can eliminate more reliably and cut off the deviation that the back suture is reserved length.
<embodiment 5 〉
Figure 10 A and Figure 10 B represent embodiments of the invention 5, and the part different with embodiment 4 described.The part mark prosign identical with embodiment 4.
In the inside of described feeding table 7, be provided with down blade solenoid (not shown) and upper knife edge solenoid (not shown), tangent line actuation mechanism 69 is driven with solenoid with solenoid, upper knife edge by following blade.This tangent line actuation mechanism 69 constitutes, and at first makes it stop at assigned position after upper knife edge member 21 rotates, and secondly only allows down blade member 22 rotate and carries out thread cutting action.
When sewing finishes, at first drive the upper knife edge solenoid, utilize entering of its plunger to make upper knife edge member 21 turn to assigned position along clockwise direction by connecting connecting rod 62.This occasion, shown in Figure 10 A, upper knife edge member 21 is set its blade 21a for and is stopped on the position of the stitching center line C of round end keyhole stitch seam HN.Then shown in Figure 10 B, drive blade solenoid down, its driving force is passed to down blade member 22 by connecting connecting rod 60, connection connecting rod 60 is rotated in the counterclockwise direction.
Thus, be at the blade 21a of upper knife edge member 21 under the state of the position parallel, only allow down blade member 22 rotate, blade 21a, 22a are met, bottom line and heart yearn are cut off with stitching center line C.Adopt this formation, even the needle gage difference of round end keyhole stitch seam HN, the end position no change because off-position is sewed relatively deviation can not occur so suture is reserved length yet.Because described off-position is the position along the stitching center line C of round end keyhole stitch seam HN, therefore can shortens after cutting off as far as possible and reserve length at the suture at sewing end position place.
The following describes the change form of previous embodiment.
The present invention is not only applicable to the thread cutting device 20 of round end button holing sewing machine 1, also is applicable to the thread cutting device of various button holing sewing machines.
The keyhole stitch seam of implementing on sewn object is not limited to the round end keyhole stitch seam HN of caudal knot shape.For example also can on sewn object, form straight hole (tack hole), and around this hole, implement the tack keyhole stitch seam, utilize thread cutting device 20 to cut off then from the suture that its end position of sewing extends.

Claims (11)

1. the thread cutting device of a button holing sewing machine, on the feeding table of the pay-off of carrying sewn object, have upper knife edge member and following blade member, described upper knife edge member and following blade member are mounted to and can rotate respectively by shared vertical axis member, the blade of blade by making described upper knife edge member and described blade member down meets in sewing end position vicinity, cut off the suture that extends from the described sewing end position of the keyhole implemented at sewn object seam, it is characterized in that
Have and make described upper knife edge member and described down blade member produce the tangent line actuation mechanism of thread cutting action and the actuator that drives described tangent line actuation mechanism,
Described tangent line actuation mechanism makes described upper knife edge member and described blade member down carry out thread cutting action, with near described sewing end position, under the state that side's blade member in described upper knife edge member and described blade member down stops operating or stops operating basically, will cut off from the suture that described sewing end position extends.
2. the thread cutting device of a button holing sewing machine, on the feeding table of the pay-off of carrying sewn object, have upper knife edge member and following blade member, described upper knife edge member and following blade member are mounted to and can rotate respectively by shared vertical axis member, the blade of blade by making described upper knife edge member and described blade member down meets in sewing end position vicinity, cut off the suture that extends from the described sewing end position of the keyhole implemented at sewn object seam, it is characterized in that
Have and make described upper knife edge member and described down blade member produce the tangent line actuation mechanism of thread cutting action and the actuator that drives described tangent line actuation mechanism,
Described tangent line actuation mechanism makes described upper knife edge member and described blade member down carry out thread cutting action, with near described sewing end position, side's blade member in described upper knife edge member and described down blade member will be cut off from the suture that described sewing end position extends from beginning to reset under the situation of rotating near a side turned position of the opposing party's blade member to greatest extent.
3. the thread cutting device of button holing sewing machine as claimed in claim 1, it is characterized in that, when utilizing described tangent line actuation mechanism to make described upper knife edge member and described down blade member carry out thread cutting action, the rotation stop position of the blade member that stops operating is that its blade is roughly along the position of the stitching center line of described keyhole seam.
4. the thread cutting device of button holing sewing machine as claimed in claim 2, it is characterized in that, when utilizing described tangent line actuation mechanism to make described upper knife edge member and described down blade member carry out thread cutting action, the blade of the blade of described upper knife edge member and described blade member down meets in the position along the stitching center line of described keyhole seam roughly.
5. the thread cutting device of button holing sewing machine as claimed in claim 1 is characterized in that, described actuator is 1 cylinder.
6. the thread cutting device of button holing sewing machine as claimed in claim 2 is characterized in that, described actuator is 1 cylinder.
7. the thread cutting device of button holing sewing machine as claimed in claim 1, it is characterized in that described actuator has: make the 1st actuator of described upper knife edge member generation action and separate the 2nd actuator that makes the described generation of blade member down action independently with the 1st actuator.
8. as the thread cutting device of each described button holing sewing machine in the claim 1,3,5,7, it is characterized in that, described blade member down constitutes the part of needle plate when making, described tangent line actuation mechanism makes described upper knife edge member and described blade member down carry out thread cutting action, with under the described down state that blade member stops operating, the described suture that extends from the sewing end position is cut off.
9. as the thread cutting device of each described button holing sewing machine in the claim 1~6, it is characterized in that described tangent line actuation mechanism passes to described upper knife edge member and described blade member down by linkage with the driving force of described actuator.
10. the thread cutting device of button holing sewing machine as claimed in claim 8 is characterized in that, described tangent line actuation mechanism passes to described upper knife edge member and described blade member down by linkage with the driving force of described actuator.
11. the thread cutting device of button holing sewing machine as claimed in claim 1 or 2 is characterized in that, described tangent line actuation mechanism passes to described upper knife edge member and described blade member down by cam mechanism with the driving force of described actuator.
CN2006101085341A 2005-07-28 2006-07-24 Thread-cutting device for keyhole sartorius Active CN1904183B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009061020A (en) * 2007-09-05 2009-03-26 Brother Ind Ltd Thread cutting apparatus for sewing machine
JP2010246841A (en) * 2009-04-20 2010-11-04 Juki Corp Sewing machine
DE102012205049A1 (en) * 2012-03-29 2013-10-02 Dürkopp Adler AG Thread cutting assembly for a lace hole sewing machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86202662U (en) * 1986-04-29 1987-09-30 杭州缝纫机厂 Buttonhole stitching machine
CN1271789A (en) * 1999-04-26 2000-11-01 重机公司 Feeding table driving device of buttonhole sewing machine
CN1511990A (en) * 2002-12-27 2004-07-14 兄弟工业株式会社 Buttonhole sewing machine
CN1580346A (en) * 2003-08-01 2005-02-16 兄弟工业株式会社 Sewing system and control device for sewing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137239A (en) * 1974-04-17 1975-10-31
JP4686025B2 (en) * 1999-12-16 2011-05-18 Juki株式会社 Sewing machine thread trimmer
JP4468550B2 (en) * 2000-05-16 2010-05-26 Juki株式会社 Thread trimming device for eyelet sewing machine
JP3940588B2 (en) * 2001-11-26 2007-07-04 Juki株式会社 Bobbin thread cutting machine
DE102004016836B3 (en) * 2004-04-01 2005-05-25 Dürkopp Adler AG Sewing machine, to stitch a seam with an end section of the looper thread, has a thread cutter with a positive link from the linear drive to open and close the cutting shears wholly by the drive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86202662U (en) * 1986-04-29 1987-09-30 杭州缝纫机厂 Buttonhole stitching machine
CN1271789A (en) * 1999-04-26 2000-11-01 重机公司 Feeding table driving device of buttonhole sewing machine
CN1511990A (en) * 2002-12-27 2004-07-14 兄弟工业株式会社 Buttonhole sewing machine
CN1580346A (en) * 2003-08-01 2005-02-16 兄弟工业株式会社 Sewing system and control device for sewing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP特开2001-321589A 2001.11.20

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